The sign for "a lot" is a variation
of the sign "big" except that the hands on "a lot" are "loose 5 handshapes" and
are pointed a bit more upward.
This sign can be used to mean "much" or to indicate a large amount of
something "uncountable" (such as "a lot of water.")
Suppose you wanted to say, "A whole bunch!" You can modify the
sign "a lot" by adding more facial expression (check out the wild and crazy eyes
eh?) and a bit of a hold just after you start the sign and then use a fast